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1. 发明授权

US06292537B1 X-ray diagnostic device including means for determining the dose 失效
标题翻译： X射线诊断装置包括用于确定剂量的装置
公开(公告)号：US06292537B1
公开(公告)日：2001-09-18
申请号：US09493963
申请日：2000-01-28
申请人： Robert Zimmermann
发明人： Robert Zimmermann
IPC分类号： H05G144
CPC分类号： A61B6/542 , A61B6/06
摘要： The invention relates to an X-ray diagnostic device in which the dose applied to a patient is determined and in which the effective dose which is of relevance for the radiation load is calculated from this dose as well as from a weighting factor which is fetched in dependence on the relevant anatomical region to be examined.
摘要翻译：本发明涉及X射线诊断装置，其中确定施用于患者的剂量，并且其中从该剂量计算与辐射负荷相关的有效剂量以及从该剂量中获取的加权因子依赖于相关解剖区域进行检查。

2. 发明授权

US06192105B1 Method and device to calibrate an automatic exposure control device in an x-ray imaging system 失效
标题翻译：在x射线成像系统中校准自动曝光控制装置的方法和装置
公开(公告)号：US06192105B1
公开(公告)日：2001-02-20
申请号：US09199154
申请日：1998-11-25
申请人： David MacKenzie Hunter , Michael L.G. Joy
发明人： David MacKenzie Hunter , Michael L.G. Joy
IPC分类号： H05G144
CPC分类号： H05G1/30
摘要： A method and device to calibrate an automatic exposure control (AEC) device in an x-ray imaging system is disclosed. An x-ray imaging system has an x-ray generator and tube to generate x-rays, an AEC device to control exposure of the x-rays, and an image sensing system, such as a film/screen combination or a digital recording system, which convert the x-rays into a converted medium, such as light, which can be easily sensed by a sensing medium. To calibrate the AEC device, a detector is placed in the position of the sensing medium to detect the converted medium. The detector detects signals indicative of the x-rays on a sensing medium. Simultaneously, a signal is obtained from the AEC. When the signal from the detector corresponds to a predetermined desired detector output, the output signal from the AEC is stored. The stored AEC output value corresponds to the target AEC output which will produce a proper exposure in the future for the same set of predetermined conditions of the imaging system. The process is repeated for different sets of predetermined conditions until all of the desired sets of predetermined conditions have been calibrated. There is a preliminary step to determine the desired detector output. This preliminary step comprises fixing an attenuation filter about the sensing means, which has graded attenuations, and placing these in the imaging system along with a detector. The x-ray generator then generates x-rays and the desired detector output is determined by comparing the attenuation caused by the attenuation filter with detected signal.
摘要翻译：公开了一种在x射线成像系统中校准自动曝光控制（AEC）装置的方法和装置。 X射线成像系统具有用于产生X射线的X射线发生器和管，用于控制x射线曝光的AEC装置，以及诸如胶片/屏幕组合或数字记录系统的图像感测系统，其将x射线转换成可以由感测介质容易地感测的转换介质，例如光。为了校准AEC设备，将检测器置于感测介质的位置以检测转换的介质。检测器检测指示感测介质上的x射线的信号。同时，从AEC获得信号。当来自检测器的信号对应于预定的期望的检测器输出时，存储来自AEC的输出信号。所存储的AEC输出值对应于目标AEC输出，其对于成像系统的相同的一组预定条件将来将产生适当的曝光。对于不同的预定条件集合重复该过程，直到已经校准了所有预定条件的所有组合。有一个初步步骤来确定所需的检测器输出。该初步步骤包括固定衰减滤波器，该衰减滤波器围绕具有渐变衰减的感测装置，并将它们与检测器一起放置在成像系统中。然后x射线发生器产生x射线，并且通过将由衰减滤波器引起的衰减与检测到的信号进行比较来确定期望的检测器输出。

3. 发明授权

US06775352B2 Method and system for implementing variable x-ray intensity modulation schemes for imaging systems 有权
标题翻译：用于成像系统实现可变x射线强度调制方案的方法和系统
公开(公告)号：US06775352B2
公开(公告)日：2004-08-10
申请号：US10064784
申请日：2002-08-16
申请人： Thomas Louis Toth , Bruce Matthew Dunham , Kelly Lynn Karau , Jianying Li
发明人： Thomas Louis Toth , Bruce Matthew Dunham , Kelly Lynn Karau , Jianying Li
IPC分类号： H05G144
CPC分类号： A61B6/544 , A61B6/027 , A61B6/032 , A61B6/542 , G01N23/046 , G01N2223/419 , G01N2223/612
摘要： A method, system and medium for modulating the x-ray power of an imaging system so as to maintain a desired image noise in the imaging system is disclosed. In an exemplary embodiment, the method includes obtaining projection data, correcting the projection data responsive to beam hardening errors so as to create corrected projection data, processing the corrected projection data so as to create a plurality of emitter current values responsive to an imaging method and applying the emitter current values to the imaging system responsive to an object to be imaged. In another aspect, a method for determining an optimum emitter tube voltage for an imaging system includes characterizing the imaging system so as to determine a system water-equivalent path length responsive to a relative noise increase. An object water-equivalent path length is then determined and compared with the system water-equivalent path length so as to create a comparison result, allowing for the recommendation of the optimum emitter tube voltage responsive to the comparison result.
摘要翻译：公开了一种用于调制成像系统的x射线功率以便在成像系统中保持期望的图像噪声的方法，系统和介质。在示例性实施例中，该方法包括获得投影数据，响应于光束硬化误差校正投影数据，以便产生校正的投影数据，处理校正的投影数据，以响应于成像方法产生多个发射极电流值，以及响应于要成像的对象将发射器电流值施加到成像系统。在另一方面，一种用于确定成像系统的最佳发射管电压的方法包括表征成像系统，以便响应于相对噪声增加来确定系统水当量路径长度。然后确定对象水当量路径长度并将其与系统水当量路径长度进行比较，以便产生比较结果，从而允许根据比较结果推荐最佳发射管电压。

4. 发明授权

US06208710B1 X-ray diagnostic apparatus and radiation diagnostic apparatus 有权
标题翻译： X射线诊断仪和放射诊断仪
公开(公告)号：US06208710B1
公开(公告)日：2001-03-27
申请号：US09357653
申请日：1999-07-20
申请人： Seiichiro Nagai
发明人： Seiichiro Nagai
IPC分类号： H05G144
CPC分类号： A61B6/542 , A61B6/00 , A61B6/06 , A61B6/4233 , H05G1/44
摘要： An X-ray diagnostic apparatus forms image data using an arbitrary region in the detectable area of a planar detector having a plurality of X-ray detector elements arrayed in a matrix. An X-ray sensor array for exposure-controlling having a plurality of X-ray sensors arrayed in a matrix overlaps the planar detector. An X-ray controller controls an X-ray tube unit on the basis of an output from the X-ray sensor array in order to optimize the X-ray dose on a subject. A controller selects at least one X-ray sensor in accordance with the position of a partial region where an image is formed. The controller controls at least one of the X-ray sensor array and X-ray controller so as to control the X-ray dose on the basis of an output from the selected X-ray sensor.
摘要翻译： X射线诊断装置使用具有以矩阵排列的多个X射线检测器元件的平面检测器的可检测区域中的任意区域形成图像数据。用于曝光控制的X射线传感器阵列具有排列成矩阵的多个X射线传感器与平面检测器重叠。 X射线控制器基于来自X射线传感器阵列的输出来控制X射线管单元，以优化被摄体上的X射线剂量。控制器根据形成图像的部分区域的位置来选择至少一个X射线传感器。控制器控制X射线传感器阵列和X射线控制器中的至少一个，以便根据所选X射线传感器的输出来控制X射线剂量。

5. 发明授权

US06754307B2 Method and device for X-ray exposure control 有权
标题翻译： X射线曝光控制方法及装置
公开(公告)号：US06754307B2
公开(公告)日：2004-06-22
申请号：US10139676
申请日：2002-05-06
申请人： Joachim Brendler , Horst Allmendinger
发明人： Joachim Brendler , Horst Allmendinger
IPC分类号： H05G144
CPC分类号： H05G1/46 , A61B6/542 , A61B6/545
摘要： The invention relates to a method for exposure control which is intended notably for dynamic X-ray examinations of an object involving a varying X-ray absorption as well as to an X-ray generator which includes an automatic exposure control unit for carrying out such a method. The method and the device are characterized notably in that an exposure kV start voltage and a maximum exposure time Tmax (for example, 100 ms) can be defined; in order to avoid motional unsharpness in the image, these variables may not be exceeded. At the beginning of an exposure, the X-ray absorption of the object is measured and within a very short period of time (from 1 ms to 2 ms) an operating range of the exposure controller is selected in that either the exposure is controlled in known manner by varying the exposure time while keeping the exposure kV start voltage constant or, in the case of a correspondingly higher absorption and/or a smaller maximum exposure time Tmax, in that the exposure is controlled by changing the exposure kV voltage at the maximum exposure time.
摘要翻译：本发明涉及一种用于曝光控制的方法，其特别适用于涉及变化的X射线吸收的物体的动态X射线检查以及X射线发生器，该X射线发生器包括自动曝光控制单元，用于执行这种方法。该方法和装置的特征在于可以定义曝光kV起始电压和最大曝光时间Tmax（例如，100ms）; 为了避免图像中的动作不清晰，可能不会超过这些变量。在曝光开始时，物体的X射线吸收被测量并且在非常短的时间段内（从1ms到2ms），选择曝光控制器的操作范围是将曝光控制在通过改变曝光时间同时保持曝光kV起始电压恒定，或者在相应较高的吸收和/或较小的最大曝光时间Tmax的情况下，通过改变曝光时间，通过改变曝光时间，通过将曝光kV电压最大化曝光时间。

6. 发明授权

US06577709B2 Fractional monitor unit radiation delivery control using dose rate modulation 有权
标题翻译：使用剂量率调制的分数监视器单元辐射传送控制
公开(公告)号：US06577709B2
公开(公告)日：2003-06-10
申请号：US09850464
申请日：2001-05-07
申请人： Randall V. Tarr
发明人： Randall V. Tarr
IPC分类号： H05G144
CPC分类号： A61N5/1048 , H05G1/44
摘要： Method and system aspects for achieving more accurate radiation delivery during radiation treatment by a radiation-emitting system are described. In a method aspect, and system for achieving same, the method includes providing a table of dose rate values for accumulated dosages in a treatment unit of the radiation emitting system, and controlling a dose rate of radiation emitted from the radiation emitting system through utilization of the table of dose rates. Controlling further includes determining an accumulated dosage at a sampling point, and comparing the accumulated dosage to a total desired dosage. The dose rate is adjusted based on the table of dose rate values and the determined accumulated dosage, with the dose rate ramped down as the accumulated dosage nears the total desired dosage. Accumulated dosages include fractional numbers of monitor units.
摘要翻译：描述了通过辐射发射系统在辐射处理期间实现更准确的辐射传递的方法和系统方面。在方法方面和用于实现其的系统中，该方法包括提供辐射发射系统的处理单元中累积剂量的剂量率值表，以及通过利用辐射发射系统控制从辐射发射系统发射的辐射的剂量率剂量率表。控制进一步包括确定采样点的累积剂量，并将累积剂量与总的所需剂量进行比较。剂量率根据剂量率值和确定的累积剂量表进行调整，剂量率随着累积剂量接近总需要剂量而下降。累计剂量包括监视器单位的分数。

7. 发明授权

US06810109B2 X-ray emitting system and method 失效
标题翻译： X射线发射系统和方法
公开(公告)号：US06810109B2
公开(公告)日：2004-10-26
申请号：US09905267
申请日：2001-07-13
申请人： Victor Chornenky
发明人： Victor Chornenky
IPC分类号： H05G144
CPC分类号： A61N5/1001 , H05G1/46
摘要： An x-ray emitting system and method for administering a predetermined x-ray dose rate are provided. The system includes an x-ray emitter, a controller operably connected to the x-ray emitter, a current sensor operably connected to the controller, and a voltage sensor operably connected to the controller. The controller determines an actual dose rate based on a received current sensor signal and a received voltage sensor signal and adjusts a supplied voltage to allow the actual dose rate to match a predetermined dose rate. The method of operating a device for emitting x-rays includes: applying a voltage from a voltage source to the device, measuring current and voltage within the device, determining an actual dose rate based on the measured current and voltage, comparing a desired dose rate to the actual dose rate, adjusting the applied voltage, and matching the actual dose rate to the desired dose rate.
摘要翻译：提供了用于施用预定x射线剂量率的x射线发射系统和方法。该系统包括x射线发射器，可操作地连接到x射线发射器的控制器，可操作地连接到控制器的电流传感器和可操作地连接到控制器的电压传感器。控制器基于接收到的电流传感器信号和接收到的电压传感器信号来确定实际剂量率，并且调整所提供的电压以允许实际剂量率与预定剂量率匹配。操作用于发射x射线的装置的方法包括：将来自电压源的电压施加到装置，测量装置内的电流和电压，基于测量的电流和电压确定实际剂量率，将期望的剂量率到实际剂量率，调整施加的电压，并将实际剂量率与期望的剂量率相匹配。

8. 发明授权

US06650729B2 Device and method for adapting the radiation dose of an X-ray source 失效
标题翻译：用于适应X射线源的辐射剂量的装置和方法
公开(公告)号：US06650729B2
公开(公告)日：2003-11-18
申请号：US10160310
申请日：2002-05-31
申请人： Henning Braess , Georg Schmitz , Harald Reiter
发明人： Henning Braess , Georg Schmitz , Harald Reiter
IPC分类号： H05G144
CPC分类号： A61B6/542 , A61B6/00
摘要： The invention relates to a method and a device for adapting a radiation dose of an X-ray source (1). The X-ray source (1) irradiates an object to be examined, for example, a patient (4), so as to form an X-ray image (7) on an X-ray detector (5). The X-ray image (7) is subdivided into image regions (A-I) and each time the brightest image region is successively separated from the remaining image regions in an iterative method if its mean grey value forms an indication of the presence of direct radiation (2b) in the relevant image region. The image regions still remaining at the end of the iteration operation correspond to an image region of interest which can be taken into account by a control unit (6) so as to calculate the optimum radiation dose.
摘要翻译：本发明涉及一种用于调整X射线源（1）的辐射剂量的方法和装置。 X射线源（1）照射被检体，例如患者（4），以在X射线检测器（5）上形成X射线图像（7）。 X射线图像（7）被细分为图像区域（AI），并且每当最亮图像区域以迭代方法与其余图像区域连续分离时，如果其平均灰度值形成直射辐射的存在的指示（ 2b）在相关图像区域。仍然保持在迭代操作结束的图像区域对应于可以由控制单元（6）考虑的感兴趣的图像区域，以便计算最佳辐射剂量。

9. 发明授权

US06647093B2 Method and device for the processing of X-ray images 失效
公开(公告)号：US06647093B2
公开(公告)日：2003-11-11
申请号：US10084758
申请日：2002-02-25
申请人： Georg Schmitz , Henning Braess , Harald Reiter
发明人： Georg Schmitz , Henning Braess , Harald Reiter
IPC分类号： H05G144
CPC分类号： G06K9/32 , A61B6/12 , A61B6/482 , G06K2209/057
摘要： The invention relates to a method and a device for the processing of X-ray images which can be used notably in medical fluoroscopy procedures since they keep the overall radiation load for a patient low. Processing of and detail enhancement in the X-ray images is preferably performed by means of a pattern matching algorithm which necessitates prior knowledge of a pattern of the detail of interest. In order to extract this pattern, at least one single image (HD) is formed (2) with a higher dose rate, said single image having an image quality which suffices for the automatic (4) or non-automatic (3) recognition of the pattern. The information extracted from this single image serves as a basis for the evaluation of X-ray images (LD2) formed with a lower dose rate.

10. 发明授权

US06459765B1 Automatic exposure control and optimization in digital x-ray radiography 有权
公开(公告)号：US06459765B1
公开(公告)日：2002-10-01
申请号：US09752847
申请日：2000-12-28
申请人： Alexander Ganin , Ping Xue , Kenneth S. Kump
发明人： Alexander Ganin , Ping Xue , Kenneth S. Kump
IPC分类号： H05G144
CPC分类号： A61B6/488 , A61B6/00 , A61B6/4233 , A61B6/544 , A61B6/583 , H05G1/30 , H05G1/38 , H05G1/44
摘要： An automatic exposure control for an x-ray system using a large area solid state x-ray detector (26) includes an exposure control (36, 34) arranged to generate data of interest within the data generated by the detector and to adjust the dosage of x-rays to a predetermined level in response to data of interest so that an x-ray image of a patient is generated using the predetermined level.

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